The Priory and St Leonards areas are the latest areas to have their street lights switched off at 12.30am.
However the busiest 'walk home' routes will keep their lighting - those include Magdalen Road, St Leonards Road, Topsham Road and Barrack Road.
The idea is to cut carbon emissions and save energy costs.
M5 reopens following crash in Devon
Litter main environmental concern among Plymouth residents
Parking fees rise at two Devon attractions
Appeal to help Torbay's homeless
Plans to save tens of millions in adult social care
Street hubs planned for Exeter
